Induction-coil casing.



H. D. GRINNELL.

INDUCTION COIL CASING.

APPLIOATION FILED DEC. 7. 1912.

1, 1 17,837, Patented Nov. 17, 1914.

2 SHIJBTS-SHEET 1.

INVENTOR i 6 Harold D. Carl/me) I,

By Mwr WITNESSES H. D. GRINNELL.

INDUCTION COIL CASING.

APPLICATION FILED DEC. 7. 1912.

1,1 1 7,837. Patented Nov. 17, 1914.

2 SHEETS-SHBET 2.

WITNESSES INVENTOR L Harold D. Grmne! I, 1

' ATTORNEYS Ida THF NURRIH PETER; 1n. PHLITO-LITHQ.\VASHVNUTUN '4 r I Original application filed April 19, 1911,

HAROLD DUNCAN GRINNELL, OF PITTSFIELD, MASSACHUSETTS.

INDUCTION-COIL CASING.

To all whom it may concern:

Be it known that I, HAROLD D. GRINNELL, a citizen of the United States, and a residentof Pittsfield, in the county of Berkshire and State of Massachusetts, have invented a new and Improved Induction-Coil Casing, of which the following is a full, clear, and exact description, this being a division of the application for an electric gas igniter and controller, Serial No. 622,117, filed by me on April 19, 1911.

An object of the invention is to provide an improved casing for induction coils which will protect the latter completely from rain and snow.

A further object of the invention is to provide a casing which is provided with a cover which holds the coil in position without the necessity of locking means and which can be removed or replaced in a minimum of time. a

Other objects and advantages will appear in the following specification and the novel features of the device will be particularly pointed out in the appended claims.

A practicalembodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of the induction coil as applied to an electric gas igniter and controller attached to an automobile: Fig. 2 is an enlarged cross section of the same. on the line 22 of Fig. 1; Fig. 3 is a sectional front elevation of the same on the line 33 of Fig. 2; Fig. 4 is a sectional plan view of the same on the line 44 of Fig. 3; and Fig. 5 is an enlarged transverse section of the adjustable cam for actuating the electric contact-maker, the section being on the line 5-5 of Fig. 3. I

The induction coil is shown applied to an electric gas igniter and controller for a gas lamp A mounted on an automobile B and supplied with gas from a tank C by means of a hose or pipe D connected with a valve E on the tank C, the valve E controlling the outflow of the gas from the tank C to the hose D and to the burner of the lamp A.

The induction coil, presently to be described in detail, is used to produce a spark on spark points located at the burner of the lamp A, with a viewto ignite the gas issuing from the burner, it being, however, understood Specification of Letters Patent.

Serial No. 622,117. Divided and 1912. Serial No. 735,458.

Patented Nov. 17, 1914.

this application filed December 7,

that in the present case the ignition takes place at the time gas is flowing out of the burner with the valve E open beyond normal position, that is, beyond such open position as to furnish the gas required for a maximum even illumination. After the gas is ignited the valve E is returned to normal position and the circuit for the spark points is cut oil'. This result is accomplished by the use of a vibrating or induction coil F contained in a metallic casing G having a telescoping cover G and fastened to the metal framework B of the automobile B.

On the front lower portion of the casing G is formed a bearing G (see Fig. 3) in which is journaled a longitudinally-extending main shaft H provided with a bevel gear wheel H in mesh with a similar gear wheel I secured on a shaft I provided with a hand wheel I within convenient reach of the operator in charge of the automobile B so that the operator can readily turn the shaft I and consequently the main shaft The rear end of the main shaft H is connected by a link H with the stem of the valve E so that when the shaft H is rotated by the operator turning the hand wheel I then the valve E is opened and closed according to the direction in which the hand wheel I is turned by the operator. The gear wheels H and I and the outer portion of the shaft H are inclosed in a casing J provided with a hub J through which extends loosely the shaft H, the inner end of the hub J abutting against one face of the gear wheel H while the outer face of the said gear wheel is engaged by a head J 2 forming part of the casing J, as shown in Fig. 3. On the casing J is secured a guide J 3 provided with a tube J and through the guide J 3 and tube J extends the shaft I. On the tube J is loosely mounted a sleeve K connected by a pivot K with a bracket K attached to the framework B of the automobile B, as plainly indicated in Fig. 2. By the arrangement described the shaft J can be moved into the desired inclined position so as to bring the hand wheel I within convenient reach of the operator in charge of the automobile.

On the shaft H is mounted to turn loosely a member L having a shoulder L, and containing a worm L in mesh with a worm wheel L attached to the main shaft H so that when the latter is rotated the member L rotates with the shaft H owing to the worm L and the worm wheel L worm L is normally locked against rotation in the member L by a set screw L (see Fig. which when partly unscrewed permits rot ion of the worm L by the operator ap l ing a screw driver or other tool to the outer solid end if of the shaft L of the worm L Thus by the arrangement described, the member L can be adjusted on the shaft so as to bring the shoulder L into proper relation with an electric contact- -ialrer N, which latter is in the form of a rod or pin mounted to slide in apertured lugs G and G formed integrally on one side f t metallic casing G containing the ng or induction coil F (see Figs. 3 and 5 The upper end of the contact maker N is adapted to engage a contact F forming part of the vibrating or induction coil and the said contact-maker N is normally held out of-contact with the contact F by a spring 0 abutting with its upper end against the under side of the lug and resting with its lower end on a collar O attached to the contact-maker N and adapted to rest on the top of the lug G A collar 0 is secured to the lower portion of the contact-maker N and is ada ated to abut against the under side of the lug G so as to limit the upward sliding movement of the con tact-maker N whenever the latter is raised by the action of the shoulder L of the member L. Now the several parts are so arranged that when the operator turns the hand wheel I in one direction, the valve E is opened to normally open position so that the gas is applied to the burner for producing a maximum even illumination, and when the valve E reaches this normal open position the shoulder L is in engagement with the lower end of the contact-maker N. When the operator gives a further turn to the handwheel I then the valve E is opened beyond normal position to produce a flare of gas at the burner, and at the same time the member L is turned to cause the shoulder L to lift the contact-maker N to engage the latter with the contact F thereby closing the circuit for the sparking points at the burner to produce an electric spark which passes through the flaring gas thus igniting thesame.

It is understood that when the contactmaker N is raised the spring 0 is compressed, and when the operator releases the hand wheel I then the spring 0 forcesthe contact-maker N downward, and in doing so the contact-maker in pressing on the shoulder L rotates the member L and with it the shaft H in a reverse direction, whereby the valve isreturned to normal open .'tion and the, same time the circuit is broken as the contact-maker N moves out of engagement with the contact F, and

hence the electricity is shut ofi from the sparking points at the burner.

The contact-maker N and the spring 0 are protected against rain by a hood G formed integrally on one side of the cover G and open at its lower end, the hood Gr inclosing the lugs G G the spring 0 and the main portion of the contact-maker N as well as the projecting end of the contact F,

as will be readily understood by reference to Fig. 4:. The insulated wire P for the coil F extends through a similar hood G formed integrally on the side of the cover G opposite the one having the hood G so that the primary wire is also protected against rain. The cover G is provided with one or more lugs G adapted to rest on the top of the coil F, so as to limit the downwardmovement of the cover G and also to hold the coil F in place. Both the hoods G and G are open on the'side facing the interior of the cover and the slots thus formed permit the passage of the stationary terminals or contacts. The insulated secondary wire Q. is connected with the coil F.

The operation is as follows: Normally the valve E is closed, and the shoulder L of the member L is a distance below the contactmaker N so that the latter is out of contact.

with the contact plate F of the coil F and hence the latter is dormant. When it is desired to light the lamp A, the operator turns the hand wheel I in one direction to rotate themain shaft H, whereby the valve. E is opened and the member L is turned" to move the shoulder L in engagement with the lower end of the contact-maker N. This takes place at the time the valve E is open to normal position, and on further turning, of the hand wheel I the valve E is opened" beyond normal position to produce a flare of gas at the burner of the lamp A and to cause the shoulder L to lift the contact maker N into engagement with the contact. plate l3" so that an electric spark is produced at the burner to ignite the gas issuing in a flare therefrom. As soon as the gas is lit, the operator releases the hand wheel I and the several'parts are now returned to nor-- position by the action of the spring 0 on the contact-maker N, that is, the latter is moved out of engagement with the contact plate F and the member L is turned and with it the shaft H to move the valve E back. into normal position to insure turning of the lamp to produce an even, uniform illumination.

From the foregoing, it will be seen that the electric spark is automatically cut off. as soon as the operator releases the hand wheel' I and the valve E is automatically returned to its normal open position. If desired, the operator can still further throttle the valve E by turning the hand wheel I in the reverse direction, it being understood that in ios direction until the valve H has moved into closed position.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

1. The combination with an induction coil having a pair of laterally extending terminals, of a casing for said coil arranged to receive the lower part of the coil, atelescopic cover for said casing having side hoods provided with slots to permit the passage of said terminals, said side hoods cov.- ering said terminals.

2. The combination with an induction coil having a pair of laterally extending terminals, of a casing for said coil arranged to receive the lower part of the coil, a telescopic cover for said casing having side hoods provided with slots to permit the passage of said terminals, said side hoods covering said terminals, and means carried by the interior of the cover and arranged to engage the top of the coil for limiting the movement of the cover and for holding the coil in position.

3. The combination with an induction coil having a pair of laterally extending terminals, of a casing for said coil arranged to receive the lower part of the coil, a telescopic cover for said casing having side hoods provided with slots to permit the passage of said terminals, said side hoods covering said terminals, means carried by the interior of the cover and arranged to engage the top of the coil for limiting the movement of the cover and for holding the coil in position, and a movable contact member normally covered by one of said hoods and arranged to engage one of said laterally extending contact members.

4. The combination with an induction coil having a pair of laterally extending terminals, of a casing for said coil arranged to receive the lower part of the coil, a telescopic cover for said casing having side hoods provided with slots to permit the passage of said terminals, said side hoods covering said terminals, an inwardly extending lug carried by the interior wall of the cover and arranged to engage the top part of the coil for holding the latter in the casing and for limiting the downward movement of the cover, and a movable contact member normally covered by one of said hoods and arranged to engage one of said laterally extending contact members.

In testimony whereof I have signed my name tothis specification in the presence of two subscribing witnesses.

HAROLD DUNCAN GRINNELL.

Vitnesses:

MILTON B. WARNER, MARY K. MURPHY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

